/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/***********************************************************
*
* Test program:	 th5s
*
* Test the dataspace functionality
*
*************************************************************/

#include "testhdf5.h"
#include "H5srcdir.h"

#include "H5private.h"
#include "H5Bprivate.h"
#include "H5Sprivate.h"
#include "H5Pprivate.h"

#define TESTFILE   "th5s.h5"
#define DATAFILE   "th5s1.h5"
#define NULLFILE   "th5s2.h5"
#define BASICFILE  "th5s3.h5"
#define ZEROFILE   "th5s4.h5"
#define BASICDATASET  "basic_dataset"
#define BASICDATASET1 "basic_dataset1"
#define BASICDATASET2 "basic_dataset2"
#define BASICDATASET3 "basic_dataset3"
#define BASICDATASET4 "basic_dataset4"
#define BASICATTR  "basic_attribute"
#define NULLDATASET  "null_dataset"
#define NULLATTR   "null_attribute"
#define EXTFILE_NAME "ext_file"

/* 3-D dataset with fixed dimensions */
#define SPACE1_RANK	3
#define SPACE1_DIM1	3
#define SPACE1_DIM2	15
#define SPACE1_DIM3	13

/* 4-D dataset with one unlimited dimension */
#define SPACE2_RANK	4
#define SPACE2_DIM1	0
#define SPACE2_DIM2	15
#define SPACE2_DIM3	13
#define SPACE2_DIM4	23
#define SPACE2_MAX1	H5S_UNLIMITED
#define SPACE2_MAX2	15
#define SPACE2_MAX3	13
#define SPACE2_MAX4	23

/* Scalar dataset with simple datatype */
#define SPACE3_RANK	0
unsigned space3_data=65;

/* Scalar dataset with compound datatype */
#define SPACE4_FIELDNAME1	"c1"
#define SPACE4_FIELDNAME2	"u"
#define SPACE4_FIELDNAME3	"f"
#define SPACE4_FIELDNAME4	"c2"
size_t space4_field1_off=0;
size_t space4_field2_off=0;
size_t space4_field3_off=0;
size_t space4_field4_off=0;
struct space4_struct {
    char c1;
    unsigned u;
    float f;
    char c2;
 } space4_data={'v',987123,-3.14F,'g'}; /* Test data for 4th dataspace */

/****************************************************************
**
**  test_h5s_basic(): Test basic H5S (dataspace) code.
**
****************************************************************/
static void
test_h5s_basic(void)
{
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		sid1, sid2;	/* Dataspace ID			*/
    hid_t		dset1;		/* Dataset ID			*/
    hid_t               aid1;           /* Attribute ID                 */
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		dims1[] = {SPACE1_DIM1, SPACE1_DIM2, SPACE1_DIM3};
    hsize_t		dims2[] = {SPACE2_DIM1, SPACE2_DIM2, SPACE2_DIM3,
				   SPACE2_DIM4};
    hsize_t		dims3[H5S_MAX_RANK+1];
    hsize_t		max2[] = {SPACE2_MAX1, SPACE2_MAX2, SPACE2_MAX3,
				  SPACE2_MAX4};
    hsize_t		tdims[4];	/* Dimension array to test with */
    hsize_t		tmax[4];
    hssize_t		n;	 	/* Number of dataspace elements */
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Dataspace Manipulation\n"));

    sid1 = H5Screate_simple(SPACE1_RANK, dims1, max2);
    CHECK(sid1, FAIL, "H5Screate_simple");

    n = H5Sget_simple_extent_npoints(sid1);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, SPACE1_DIM1 * SPACE1_DIM2 * SPACE1_DIM3,
	   "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(sid1);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE1_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(sid1, tdims, NULL);
    CHECK(rank, FAIL, "H5Sget_simple_extent_dims");
    VERIFY(HDmemcmp(tdims, dims1, SPACE1_RANK * sizeof(hsize_t)), 0,
	   "H5Sget_simple_extent_dims");

    sid2 = H5Screate_simple(SPACE2_RANK, dims2, max2);
    CHECK(sid2, FAIL, "H5Screate_simple");

    n = H5Sget_simple_extent_npoints(sid2);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, SPACE2_DIM1 * SPACE2_DIM2 * SPACE2_DIM3 * SPACE2_DIM4,
	   "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(sid2);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE2_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(sid2, tdims, tmax);
    CHECK(rank, FAIL, "H5Sget_simple_extent_dims");
    VERIFY(HDmemcmp(tdims, dims2, SPACE2_RANK * sizeof(hsize_t)), 0,
	   "H5Sget_simple_extent_dims");
    VERIFY(HDmemcmp(tmax, max2, SPACE2_RANK * sizeof(hsize_t)), 0,
	   "H5Sget_simple_extent_dims");

    /* Change max dims to be equal to the dimensions */
    ret = H5Sset_extent_simple(sid1, SPACE1_RANK, dims1, NULL);
    CHECK(ret, FAIL, "H5Sset_extent_simple");
    rank = H5Sget_simple_extent_dims(sid1, tdims, tmax);
    CHECK(rank, FAIL, "H5Sget_simple_extent_dims");
    VERIFY(HDmemcmp(tdims, dims1, SPACE1_RANK * sizeof(hsize_t)), 0,
	   "H5Sget_simple_extent_dims");
    VERIFY(HDmemcmp(tmax, dims1, SPACE1_RANK * sizeof(hsize_t)), 0,
	   "H5Sget_simple_extent_dims");

    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(sid2);
    CHECK(ret, FAIL, "H5Sclose");

    /*
     * Check to be sure we can't create a simple data space that has too many
     * dimensions.
     */
    H5E_BEGIN_TRY {
	sid1 = H5Screate_simple(H5S_MAX_RANK+1, dims3, NULL);
    } H5E_END_TRY;
    VERIFY(sid1, FAIL, "H5Screate_simple");

    /*
     * Try reading a file that has been prepared that has a dataset with a
     * higher dimensionality than what the library can handle.
     *
     * If this test fails and the H5S_MAX_RANK variable has changed, follow
     * the instructions in space_overflow.c for regenerating the th5s.h5 file.
     */
    {
    char testfile[512]="";
    char *srcdir = HDgetenv("srcdir");
    if (srcdir && ((HDstrlen(srcdir) + HDstrlen(TESTFILE) + 1) < sizeof(testfile))){
	HDstrcpy(testfile, srcdir);
	HDstrcat(testfile, "/");
    }
    HDstrcat(testfile, TESTFILE);
    fid1 = H5Fopen(testfile, H5F_ACC_RDONLY, H5P_DEFAULT);
    CHECK_I(fid1, "H5Fopen");
    if (fid1 >= 0){
	dset1 = H5Dopen2(fid1, "dset", H5P_DEFAULT);
	VERIFY(dset1, FAIL, "H5Dopen2");
	ret = H5Fclose(fid1);
	CHECK_I(ret, "H5Fclose");
    }
    else
	printf("***cannot open the pre-created H5S_MAX_RANK test file (%s)\n",
	    testfile);
    }

    /* Verify that incorrect dimensions don't work */
    dims1[0] = H5S_UNLIMITED;
    sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
    VERIFY(sid1, FAIL, "H5Screate_simple");

    dims1[0] = H5S_UNLIMITED;
    sid1 = H5Screate(H5S_SIMPLE);
    CHECK(sid1, FAIL, "H5Screate");

    ret = H5Sset_extent_simple(sid1,SPACE1_RANK,dims1,NULL);
    VERIFY(ret, FAIL, "H5Sset_extent_simple");

    ret = H5Sclose(sid1);
    CHECK_I(ret, "H5Sclose");

    /*
     * Try writing simple dataspaces without setting their extents
     */
    /* Create the file */
    fid1 = H5Fcreate(BASICFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fcreate");

    dims1[0]=SPACE1_DIM1;

    sid1 = H5Screate(H5S_SIMPLE);
    CHECK(sid1, FAIL, "H5Screate");
    sid2 = H5Screate_simple(1, dims1, dims1);
    CHECK(sid2, FAIL, "H5Screate");

    /* This dataset's space has no extent; it should not be created */
    H5E_BEGIN_TRY {
    dset1 = H5Dcreate2(fid1, BASICDATASET, H5T_NATIVE_INT, sid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    } H5E_END_TRY
    VERIFY(dset1, FAIL, "H5Dcreate2");

    dset1 = H5Dcreate2(fid1, BASICDATASET2, H5T_NATIVE_INT, sid2, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(dset1, FAIL, "H5Dcreate2");

    /* Try some writes with the bad dataspace (sid1) */
    H5E_BEGIN_TRY {
    ret = H5Dwrite(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, &n);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dwrite");

    H5E_BEGIN_TRY {
    ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, sid1, H5P_DEFAULT, &n);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dwrite");

    H5E_BEGIN_TRY {
    ret = H5Dwrite(dset1, H5T_NATIVE_INT, sid1, sid1, H5P_DEFAULT, &n);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dwrite");

    /* Try to iterate using the bad dataspace */
    H5E_BEGIN_TRY {
    ret = H5Diterate(&n, H5T_NATIVE_INT, sid1, NULL, NULL);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Diterate");

    /* Try to fill using the bad dataspace */
    H5E_BEGIN_TRY {
    ret = H5Dfill(NULL, H5T_NATIVE_INT, &n, H5T_NATIVE_INT, sid1);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dfill");

    /* Now use the bad dataspace as the space for an attribute */
    H5E_BEGIN_TRY {
    aid1 = H5Acreate2(dset1, BASICATTR, H5T_NATIVE_INT, sid1, H5P_DEFAULT, H5P_DEFAULT);
    } H5E_END_TRY
    VERIFY(aid1, FAIL, "H5Acreate2");

    /* Make sure that dataspace reads using the bad dataspace fail */
    H5E_BEGIN_TRY {
    ret = H5Dread(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, &n);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dread");

    H5E_BEGIN_TRY {
    ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, sid1, H5P_DEFAULT, &n);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dread");

    H5E_BEGIN_TRY {
    ret = H5Dread(dset1, H5T_NATIVE_INT, sid1, sid1, H5P_DEFAULT, &n);
    } H5E_END_TRY
    VERIFY(ret, FAIL, "H5Dread");

    /* Clean up */
    ret = H5Dclose(dset1);
    CHECK(ret, FAIL, "H5Dclose");
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(sid2);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
}				/* test_h5s_basic() */

/****************************************************************
**
**  test_h5s_null(): Test NULL data space
**
****************************************************************/
static void
test_h5s_null(void)
{
    hid_t fid;          /* File ID */
    hid_t sid;          /* Dataspace IDs */
    hid_t dset_sid, dset_sid2;    /* Dataspace IDs */
    hid_t attr_sid;     /* Dataspace IDs */
    hid_t did;          /* Dataset ID */
    hid_t attr;         /*Attribute ID */
    H5S_class_t stype;  /* dataspace type */
    hssize_t nelem;     /* Number of elements */
    unsigned uval=2;    /* Buffer for writing to dataset */
    int val=1;          /* Buffer for writing to attribute */
    H5S_sel_type sel_type;      /* Type of selection currently */
    hsize_t dims[1]={10};       /* Dimensions for converting null dataspace to simple */
    H5S_class_t space_type;     /* Type of dataspace */
    herr_t ret;         /* Generic return value */

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Null Dataspace\n"));

    /* Create the file */
    fid = H5Fcreate(NULLFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid, FAIL, "H5Fcreate");

    sid = H5Screate(H5S_NULL);
    CHECK(sid, FAIL, "H5Screate");

    /* Check that the null dataspace actually has 0 elements */
    nelem = H5Sget_simple_extent_npoints(sid);
    VERIFY(nelem, 0, "H5Sget_simple_extent_npoints");

    /* Check that the dataspace was created with an "all" selection */
    sel_type = H5Sget_select_type(sid);
    VERIFY(sel_type, H5S_SEL_ALL, "H5Sget_select_type");

    /* Check that the null dataspace has 0 elements selected */
    nelem = H5Sget_select_npoints(sid);
    VERIFY(nelem, 0, "H5Sget_select_npoints");

    /* Change to "none" selection */
    ret = H5Sselect_none(sid);
    CHECK(ret, FAIL, "H5Sselect_none");

    /* Check that the null dataspace has 0 elements selected */
    nelem = H5Sget_select_npoints(sid);
    VERIFY(nelem, 0, "H5Sget_select_npoints");

    /* Check to be sure we can't set a hyperslab selection on a null dataspace */
    H5E_BEGIN_TRY {
        hsize_t start[1]={0};
        hsize_t count[1]={0};

	ret = H5Sselect_hyperslab(sid, H5S_SELECT_SET, start, NULL, count, NULL);
    } H5E_END_TRY;
    VERIFY(ret, FAIL, "H5Sselect_hyperslab");

    /* Check to be sure we can't set a point selection on a null dataspace */
    H5E_BEGIN_TRY {
        hsize_t	coord[1][1]; /* Coordinates for point selection */

        coord[0][0]=0;
	ret = H5Sselect_elements(sid, H5S_SELECT_SET, (size_t)1, (const hsize_t *)coord);
    } H5E_END_TRY;
    VERIFY(ret, FAIL, "H5Sselect_elements");

    /* Create first dataset */
    did = H5Dcreate2(fid, NULLDATASET, H5T_NATIVE_UINT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(did, FAIL, "H5Dcreate2");

    /* Write "nothing" to the dataset */
    ret = H5Dwrite(did, H5T_NATIVE_UINT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &uval);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Write "nothing" to the dataset (with type conversion :-) */
    ret = H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &val);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Try reading from the dataset (make certain our buffer is unmodified) */
    ret = H5Dread(did, H5T_NATIVE_UINT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &uval);
    CHECK(ret, FAIL, "H5Dread");
    VERIFY(uval, 2, "H5Dread");

    /* Try reading from the dataset (with type conversion :-) (make certain our buffer is unmodified) */
    ret = H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &val);
    CHECK(ret, FAIL, "H5Dread");
    VERIFY(val, 1, "H5Dread");

    /* Create an attribute for the group */
    attr = H5Acreate2(did, NULLATTR, H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(attr, FAIL, "H5Acreate2");

    /* Write "nothing" to the attribute */
    ret = H5Awrite(attr, H5T_NATIVE_INT, &val);
    CHECK(ret, FAIL, "H5Awrite");

    /* Write "nothing" to the attribute (with type conversion :-) */
    ret = H5Awrite(attr, H5T_NATIVE_UINT, &uval);
    CHECK(ret, FAIL, "H5Awrite");

    /* Try reading from the attribute (make certain our buffer is unmodified) */
    ret = H5Aread(attr, H5T_NATIVE_INT, &val);
    CHECK(ret, FAIL, "H5Aread");
    VERIFY(val, 1, "H5Aread");

    /* Try reading from the attribute (with type conversion :-) (make certain our buffer is unmodified) */
    ret = H5Aread(attr, H5T_NATIVE_UINT, &uval);
    CHECK(ret, FAIL, "H5Aread");
    VERIFY(uval, 2, "H5Aread");

    /* Close attribute */
    ret=H5Aclose(attr);
    CHECK(ret, FAIL, "H5Aclose");

    /* Close the dataset */
    ret = H5Dclose(did);
    CHECK(ret, FAIL, "H5Dclose");

    /* Verify that we've got the right kind of dataspace */
    space_type = H5Sget_simple_extent_type(sid);
    VERIFY(space_type, H5S_NULL, "H5Sget_simple_extent_type");

    /* Convert the null dataspace to a simple dataspace */
    ret = H5Sset_extent_simple(sid, 1, dims, NULL);
    CHECK(ret, FAIL, "H5Sset_extent_simple");

    /* Verify that we've got the right kind of dataspace now */
    space_type = H5Sget_simple_extent_type(sid);
    VERIFY(space_type, H5S_SIMPLE, "H5Sget_simple_extent_type");

    /* Close the dataspace */
    ret = H5Sclose(sid);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close the file */
    ret = H5Fclose(fid);
    CHECK(ret, FAIL, "H5Fclose");

    /*============================================
     *  Reopen the file to check the data space
     *============================================
     */
    fid = H5Fopen(NULLFILE, H5F_ACC_RDONLY, H5P_DEFAULT);
    CHECK(fid, FAIL, "H5Fopen");

    /* Reopen the dataset */
    did = H5Dopen2(fid, NULLDATASET, H5P_DEFAULT);
    CHECK(did, FAIL, "H5Dopen2");

    /* Get the space of the dataset */
    dset_sid = H5Dget_space(did);
    CHECK(dset_sid, FAIL, "H5Dget_space");

    /* Query the NULL dataspace */
    dset_sid2 = H5Scopy(dset_sid);
    CHECK(dset_sid2, FAIL, "H5Scopy");

    /* Verify the class type of dataspace */
    stype = H5Sget_simple_extent_type(dset_sid2);
    VERIFY(stype, H5S_NULL, "H5Sget_simple_extent_type");

    /* Verify there is zero element in the dataspace */
    ret = (herr_t)H5Sget_simple_extent_npoints(dset_sid2);
    VERIFY(ret, 0, "H5Sget_simple_extent_npoints");

    /* Try reading from the dataset (make certain our buffer is unmodified) */
    ret = H5Dread(did, H5T_NATIVE_UINT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &uval);
    CHECK(ret, FAIL, "H5Dread");
    VERIFY(uval, 2, "H5Dread");

    /* Close the dataspace */
    ret = H5Sclose(dset_sid);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(dset_sid2);
    CHECK(ret, FAIL, "H5Sclose");

    /* Open the attribute for the dataset */
    attr = H5Aopen(did, NULLATTR, H5P_DEFAULT);
    CHECK(attr, FAIL, "H5Aopen");

    /* Get the space of the dataset */
    attr_sid = H5Aget_space(attr);
    CHECK(attr_sid, FAIL, "H5Aget_space");

    /* Verify the class type of dataspace */
    stype = H5Sget_simple_extent_type(attr_sid);
    VERIFY(stype, H5S_NULL, "H5Sget_simple_extent_type");

    /* Verify there is zero element in the dataspace */
    ret = (herr_t)H5Sget_simple_extent_npoints(attr_sid);
    VERIFY(ret, 0, "H5Sget_simple_extent_npoints");

    /* Close the dataspace */
    ret = H5Sclose(attr_sid);
    CHECK(ret, FAIL, "H5Sclose");

    /* Try reading from the attribute (make certain our buffer is unmodified) */
    ret = H5Aread(attr, H5T_NATIVE_INT, &val);
    CHECK(ret, FAIL, "H5Aread");
    VERIFY(val, 1, "H5Aread");

    /* Close attribute */
    ret=H5Aclose(attr);
    CHECK(ret, FAIL, "H5Aclose");

    /* Close the dataset */
    ret = H5Dclose(did);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close the file */
    ret = H5Fclose(fid);
    CHECK(ret, FAIL, "H5Fclose");
} /* end test_h5s_null() */

/****************************************************************
**
**  test_h5s_zero_dim(): Test the code for dataspace with zero dimension size
**
****************************************************************/
static void
test_h5s_zero_dim(void)
{
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		sid1, attr_sid;	/* Dataspace ID			*/
    hid_t		sid_chunk;	/* Dataspace ID for chunked dataset */
    hid_t		dset1;		/* Dataset ID			*/
    hid_t               plist_id;       /* Dataset creation property list */
    hid_t               attr;           /* Attribute ID                 */
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		dims1[] = {0, SPACE1_DIM2, SPACE1_DIM3};
    hsize_t		max_dims[] = {SPACE1_DIM1+1, SPACE1_DIM2, SPACE1_DIM3};
    hsize_t		extend_dims[] = {SPACE1_DIM1, SPACE1_DIM2, SPACE1_DIM3};
    hsize_t             chunk_dims[] = {SPACE1_DIM1, SPACE1_DIM2/3, SPACE1_DIM3};
    hsize_t		tdims[SPACE1_RANK];	/* Dimension array to test with */
    int                 wdata[SPACE1_DIM2][SPACE1_DIM3];
    int                 rdata[SPACE1_DIM2][SPACE1_DIM3];
    short               wdata_short[SPACE1_DIM2][SPACE1_DIM3];
    short               rdata_short[SPACE1_DIM2][SPACE1_DIM3];
    int                 wdata_real[SPACE1_DIM1][SPACE1_DIM2][SPACE1_DIM3];
    int                 rdata_real[SPACE1_DIM1][SPACE1_DIM2][SPACE1_DIM3];
    int                 val = 3;
    hsize_t             start[] = {0, 0, 0};
    hsize_t             count[] = {3, 15, 13};
    hsize_t	        coord[1][3];    /* Coordinates for point selection */
    hssize_t            nelem;          /* Number of elements           */
    H5S_sel_type        sel_type;       /* Type of selection currently  */
    H5S_class_t         stype;          /* dataspace type               */
    H5D_alloc_time_t    alloc_time;     /* Space allocation time        */
    herr_t		ret;		/* Generic return value	        */
    unsigned int        i, j, k;

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Dataspace with zero dimension size\n"));

    /* Initialize the data */
    for(i=0; i<SPACE1_DIM2; i++)
        for(j=0; j<SPACE1_DIM3; j++) {
            wdata[i][j] = i + j;
            rdata[i][j] = 7;
            wdata_short[i][j] = i + j;
            rdata_short[i][j] = 7;
        }

    for(i=0; i<SPACE1_DIM1; i++)
        for(j=0; j<SPACE1_DIM2; j++)
            for(k=0; k<SPACE1_DIM3; k++)
                wdata_real[i][j][k] = i + j + k;

    /* Test with different space allocation times */
    for(alloc_time = H5D_ALLOC_TIME_EARLY; alloc_time <= H5D_ALLOC_TIME_INCR; alloc_time++) {

        /* Make sure we can create the space with the dimension size 0 (starting from v1.8.7).
         * The dimension doesn't need to be unlimited. */
        dims1[0] = 0;
        dims1[1] = SPACE1_DIM2;
        dims1[2] = SPACE1_DIM3;
        sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
        CHECK(sid1, FAIL, "H5Screate_simple");

        ret = H5Sclose(sid1);
        CHECK(ret, FAIL, "H5Sclose");

        sid1 = H5Screate(H5S_SIMPLE);
        CHECK(sid1, FAIL, "H5Screate");

        /* SID1 has the 1st dimension size as zero.  The maximal dimension will be
         * the same as the dimension because of the NULL passed in. */
        ret = H5Sset_extent_simple(sid1,SPACE1_RANK,dims1,NULL);
        CHECK(ret, FAIL, "H5Sset_extent_simple");

        /* Check that the dataspace actually has 0 elements */
        nelem = H5Sget_simple_extent_npoints(sid1);
        VERIFY(nelem, 0, "H5Sget_simple_extent_npoints");

        /* Check that the dataspace was created with an "all" selection */
        sel_type = H5Sget_select_type(sid1);
        VERIFY(sel_type, H5S_SEL_ALL, "H5Sget_select_type");

        /* Check that the dataspace has 0 elements selected */
        nelem = H5Sget_select_npoints(sid1);
        VERIFY(nelem, 0, "H5Sget_select_npoints");

        /* Change to "none" selection */
        ret = H5Sselect_none(sid1);
        CHECK(ret, FAIL, "H5Sselect_none");

        /* Check that the dataspace has 0 elements selected */
        nelem = H5Sget_select_npoints(sid1);
        VERIFY(nelem, 0, "H5Sget_select_npoints");

        /* Try to select all dataspace */
        ret = H5Sselect_all(sid1);
        CHECK(ret, FAIL, "H5Sselect_all");

        /* Check that the dataspace has 0 elements selected */
        nelem = H5Sget_select_npoints(sid1);
        VERIFY(nelem, 0, "H5Sget_select_npoints");

        /* Create the dataspace for chunked dataset with the first dimension size as zero.
         * The maximal dimensions are bigger than the dimensions for later expansion. */
        sid_chunk = H5Screate_simple(SPACE1_RANK, dims1, max_dims);
        CHECK(sid_chunk, FAIL, "H5Screate_simple");

        /*============================================
         * Make sure we can use 0-dimension to create 
         * contiguous, chunked, compact, and external 
         * datasets, and also attribute.
         *============================================
         */
        fid1 = H5Fcreate(ZEROFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
        CHECK(fid1, FAIL, "H5Fcreate");

        /*===================== Contiguous dataset =======================*/
        plist_id = H5Pcreate(H5P_DATASET_CREATE);
        CHECK(plist_id, FAIL, "H5Pcreate");

        ret = H5Pset_alloc_time(plist_id, alloc_time);
        CHECK(ret, FAIL, "H5Pset_alloc_time");

        dset1 = H5Dcreate2(fid1, BASICDATASET, H5T_NATIVE_INT, sid1, H5P_DEFAULT, plist_id, H5P_DEFAULT);
        CHECK(dset1, FAIL, "H5Dcreate2");

        ret = H5Pclose(plist_id);
        CHECK(ret, FAIL, "H5Pclose");

        /* Write "nothing" to the dataset */
        ret = H5Dwrite(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, wdata);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, rdata);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
            }
        }

        /* Write "nothing" to the dataset (with type conversion :-) */
        ret = H5Dwrite(dset1, H5T_NATIVE_SHORT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata_short);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, rdata_short);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata_short[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata_short[i][j]);
                }
            }
        }

        /* Select a hyperslab beyond its current dimension sizes, then try to write 
         * the data.  It should fail. */
        ret = H5Sselect_hyperslab(sid1, H5S_SELECT_SET, start, NULL, count, NULL);
        CHECK(ret, FAIL, "H5Sselect_hyperslab");

        H5E_BEGIN_TRY {
            ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, sid1, H5P_DEFAULT, wdata);
        } H5E_END_TRY;
        VERIFY(ret, FAIL, "H5Dwrite");

        /* Change to "none" selection */
        ret = H5Sselect_none(sid1);
        CHECK(ret, FAIL, "H5Sselect_none");

        /* Select a point beyond the dimension size, then try to write the data. 
         * It should fail. */
        coord[0][0]=2; coord[0][1]=5; coord[0][2]=3;
        ret = H5Sselect_elements(sid1, H5S_SELECT_SET, (size_t)1, (const hsize_t *)coord);
        CHECK(ret, FAIL, "H5Sselect_elements");

        H5E_BEGIN_TRY {
            ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, sid1, H5P_DEFAULT, &val);
        } H5E_END_TRY;
        VERIFY(ret, FAIL, "H5Dwrite");

        /* Restore the selection to all */
        ret = H5Sselect_all(sid1);
        CHECK(ret, FAIL, "H5Sselect_all");

        ret = H5Dclose(dset1);
        CHECK(ret, FAIL, "H5Dclose");

        /*=================== Chunked dataset ====================*/
        plist_id = H5Pcreate(H5P_DATASET_CREATE);
        CHECK(plist_id, FAIL, "H5Pcreate");

        ret = H5Pset_chunk(plist_id, SPACE1_RANK, chunk_dims);
        CHECK(ret, FAIL, "H5Pset_chunk");

        /* ret = H5Pset_alloc_time(plist_id, alloc_time); */
        /* CHECK(ret, FAIL, "H5Pset_alloc_time"); */

        dset1 = H5Dcreate2(fid1, BASICDATASET1, H5T_NATIVE_INT, sid_chunk, H5P_DEFAULT, plist_id, H5P_DEFAULT);
        CHECK(dset1, FAIL, "H5Dcreate2");

        /* Write "nothing" to the dataset */
        ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++)
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
        }

        /* Now extend the dataset to SPACE1_DIM1*SPACE1_DIM2*SPACE1_DIM3 and make sure 
         * we can write data to it */ 
        extend_dims[0] = SPACE1_DIM1;
        ret = H5Dset_extent(dset1, extend_dims);
        CHECK(ret, FAIL, "H5Dset_extent");

        ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata_real);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata_real);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM1; i++) {
            for(j=0; j<SPACE1_DIM2; j++) {
                for(k=0; k<SPACE1_DIM3; k++) {
                    if(rdata_real[i][j][k] != wdata_real[i][j][k]) {
                        H5_FAILED();
                        printf("element [%d][%d][%d] is %d but should have been %d\n",
                           i, j, k, rdata_real[i][j][k], wdata_real[i][j][k]);
                    }
                }
            }
        }

        /* Now shrink the first dimension size of the dataset to 0 and make sure no data is in it */
        extend_dims[0] = 0;
        ret = H5Dset_extent(dset1, extend_dims);
        CHECK(ret, FAIL, "H5Dset_extent");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++)
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
        }

        /* Now extend the first dimension size of the dataset to SPACE1_DIM1*3 past the maximal size.
         * It is supposed to fail. */
        extend_dims[0] = SPACE1_DIM1*3;
        H5E_BEGIN_TRY {
            ret = H5Dset_extent(dset1, extend_dims);
        } H5E_END_TRY;
        VERIFY(ret, FAIL, "H5Dset_extent");

        ret = H5Pclose(plist_id);
        CHECK(ret, FAIL, "H5Pclose");

        ret = H5Dclose(dset1);
        CHECK(ret, FAIL, "H5Dclose");

        /*=================== Compact dataset =====================*/
        plist_id = H5Pcreate(H5P_DATASET_CREATE);
        CHECK(plist_id, FAIL, "H5Pcreate");

        ret = H5Pset_layout(plist_id, H5D_COMPACT);
        CHECK(ret, FAIL, "H5Pset_layout");

        /* Don't set the allocation time for compact storage datasets (must be early) */

        dset1 = H5Dcreate2(fid1, BASICDATASET2, H5T_NATIVE_INT, sid1, H5P_DEFAULT, plist_id, H5P_DEFAULT);
        CHECK(dset1, FAIL, "H5Dcreate2");

        /* Write "nothing" to the dataset */
        ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++)
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
        }

        ret = H5Pclose(plist_id);
        CHECK(ret, FAIL, "H5Pclose");

        ret = H5Dclose(dset1);
        CHECK(ret, FAIL, "H5Dclose");

        /*=========== Contiguous dataset with external storage ============*/
        plist_id = H5Pcreate(H5P_DATASET_CREATE);
        CHECK(plist_id, FAIL, "H5Pcreate");

        /* Change the DCPL for contiguous layout with external storage.  The size of the reserved
         * space in the external file is the size of the dataset (zero because one dimension size is zero).
         * There's no need to clean up the external file since the library doesn't create it
         * until the data is written to it. */
        ret = H5Pset_external(plist_id, EXTFILE_NAME, (off_t)0, (hsize_t)0);
        CHECK(ret, FAIL, "H5Pset_external");

        ret = H5Pset_alloc_time(plist_id, alloc_time);
        CHECK(ret, FAIL, "H5Pset_alloc_time");

        dset1 = H5Dcreate2(fid1, BASICDATASET3, H5T_NATIVE_INT, sid1, H5P_DEFAULT, plist_id, H5P_DEFAULT);
        CHECK(dset1, FAIL, "H5Dcreate2");

        /* Write "nothing" to the dataset */
        ret = H5Dwrite(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, wdata);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, sid1, H5S_ALL, H5P_DEFAULT, rdata);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
            }
        }

        ret = H5Pclose(plist_id);
        CHECK(ret, FAIL, "H5Pclose");

        ret = H5Dclose(dset1);
        CHECK(ret, FAIL, "H5Dclose");

        /*=============== Create an attribute for the file ================*/
        attr = H5Acreate2(fid1, NULLATTR, H5T_NATIVE_INT, sid1, H5P_DEFAULT, H5P_DEFAULT);
        CHECK(attr, FAIL, "H5Acreate2");

        /* Write "nothing" to the attribute */
        ret = H5Awrite(attr, H5T_NATIVE_INT, wdata);
        CHECK(ret, FAIL, "H5Awrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the attribute (make certain our buffer is unmodified) */
        ret = H5Aread(attr, H5T_NATIVE_INT, rdata);
        CHECK(ret, FAIL, "H5Aread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
            }
        }

        /* Write "nothing" to the attribute (with type conversion :-) */
        ret = H5Awrite(attr, H5T_NATIVE_SHORT, wdata_short);
        CHECK(ret, FAIL, "H5Awrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        /* Try reading from the attribute (with type conversion :-) (make certain our buffer is unmodified) */
        ret = H5Aread(attr, H5T_NATIVE_SHORT, rdata_short);
        CHECK(ret, FAIL, "H5Aread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata_short[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata_short[i][j]);
                }
            }
        }

        /* Close attribute */
        ret = H5Aclose(attr);
        CHECK(ret, FAIL, "H5Aclose");

        /*===============================================================
         * Extend the dimension to make it a normal dataspace (3x15x13).  
         * Verify that data can be written to and read from the chunked 
         * dataset now. 
         *=============================================================== 
         */
        dims1[0]=SPACE1_DIM1;
        ret = H5Sset_extent_simple(sid_chunk,SPACE1_RANK,dims1,max_dims);
        CHECK(ret, FAIL, "H5Sset_extent_simple");

        nelem = H5Sget_simple_extent_npoints(sid_chunk);
        CHECK(nelem, FAIL, "H5Sget_simple_extent_npoints");
        VERIFY(nelem, SPACE1_DIM1 * SPACE1_DIM2 * SPACE1_DIM3,
               "H5Sget_simple_extent_npoints");

        rank = H5Sget_simple_extent_ndims(sid_chunk);
        CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
        VERIFY(rank, SPACE1_RANK, "H5Sget_simple_extent_ndims");

        rank = H5Sget_simple_extent_dims(sid_chunk, tdims, NULL);
        CHECK(rank, FAIL, "H5Sget_simple_extent_dims");
        VERIFY(HDmemcmp(tdims, dims1, SPACE1_RANK * sizeof(hsize_t)), 0,
               "H5Sget_simple_extent_dims");

        /* Set it to chunked dataset */
        plist_id = H5Pcreate(H5P_DATASET_CREATE);
        CHECK(plist_id, FAIL, "H5Pcreate");

        ret = H5Pset_chunk(plist_id, SPACE1_RANK, chunk_dims);
        CHECK(ret, FAIL, "H5Pset_chunk");

        ret = H5Pset_alloc_time(plist_id, alloc_time);
        CHECK(ret, FAIL, "H5Pset_alloc_time");

        dset1 = H5Dcreate2(fid1, BASICDATASET4, H5T_NATIVE_INT, sid_chunk, H5P_DEFAULT, plist_id, H5P_DEFAULT);
        CHECK(dset1, FAIL, "H5Dcreate2");

        ret = H5Dwrite(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata_real);
        CHECK(ret, FAIL, "H5Dwrite");

        ret = H5Fflush(fid1, H5F_SCOPE_GLOBAL);
        CHECK(ret, FAIL, "H5Fflush");

        ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata_real);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM1; i++) {
            for(j=0; j<SPACE1_DIM2; j++) {
                for(k=0; k<SPACE1_DIM3; k++) {
                    if(rdata_real[i][j][k] != wdata_real[i][j][k]) {
                        H5_FAILED();
                        printf("element [%d][%d][%d] is %d but should have been %d\n",
                           i, j, k, rdata_real[i][j][k], wdata_real[i][j][k]);
                    }
                }
            }
        }

        ret = H5Pclose(plist_id);
        CHECK(ret, FAIL, "H5Pclose");

        ret = H5Dclose(dset1);
        CHECK(ret, FAIL, "H5Dclose");

        /* Change the dimensions to make them zero size again (0x0x0).  Verify that
         * no element is in the dataspace. */
        dims1[0]=dims1[1]=dims1[2]=0;
        ret = H5Sset_extent_simple(sid_chunk,SPACE1_RANK,dims1,NULL);
        CHECK(ret, FAIL, "H5Sset_extent_simple");

        /* Check that the dataspace actually has 0 elements */
        nelem = H5Sget_simple_extent_npoints(sid_chunk);
        VERIFY(nelem, 0, "H5Sget_simple_extent_npoints");

        /* Check that the dataspace was created with an "all" selection */
        sel_type = H5Sget_select_type(sid_chunk);
        VERIFY(sel_type, H5S_SEL_ALL, "H5Sget_select_type");

        /* Check that the dataspace has 0 elements selected */
        nelem = H5Sget_select_npoints(sid_chunk);
        VERIFY(nelem, 0, "H5Sget_select_npoints");

        /* Change to "none" selection */
        ret = H5Sselect_none(sid_chunk);
        CHECK(ret, FAIL, "H5Sselect_none");

        /* Check that the dataspace has 0 elements selected */
        nelem = H5Sget_select_npoints(sid_chunk);
        VERIFY(nelem, 0, "H5Sget_select_npoints");

        ret = H5Sclose(sid_chunk);
        CHECK(ret, FAIL, "H5Sclose");

        ret = H5Sclose(sid1);
        CHECK(ret, FAIL, "H5Sclose");

        ret = H5Fclose(fid1);
        CHECK(ret, FAIL, "H5Fclose");

        /*============================================
         *  Reopen the file to check the data space
         *============================================
         */
        fid1 = H5Fopen(ZEROFILE, H5F_ACC_RDONLY, H5P_DEFAULT);
        CHECK(fid1, FAIL, "H5Fopen");

        /* Reopen the chunked dataset */
        dset1 = H5Dopen2(fid1, BASICDATASET1, H5P_DEFAULT);
        CHECK(dset1, FAIL, "H5Dopen2");

        /* Get the space of the dataset and querry it */
        sid1 = H5Dget_space(dset1);
        CHECK(sid1, FAIL, "H5Dget_space");

        /* Verify the class type of dataspace */
        stype = H5Sget_simple_extent_type(sid1);
        VERIFY(stype, H5S_SIMPLE, "H5Sget_simple_extent_type");

        /* Verify there is zero element in the dataspace */
        nelem = H5Sget_simple_extent_npoints(sid1);
        VERIFY(nelem, 0, "H5Sget_simple_extent_npoints");

        /* Verify the dimension sizes are correct */
        rank = H5Sget_simple_extent_dims(sid1, tdims, NULL);
        CHECK(rank, FAIL, "H5Sget_simple_extent_dims");
        VERIFY(tdims[0], 0, "H5Sget_simple_extent_dims");
        VERIFY(tdims[1], SPACE1_DIM2, "H5Sget_simple_extent_dims");
        VERIFY(tdims[2], SPACE1_DIM3, "H5Sget_simple_extent_dims");

        /* Try reading from the dataset (make certain our buffer is unmodified) */
        ret = H5Dread(dset1, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata);
        CHECK(ret, FAIL, "H5Dread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata[i][j]);
                }
            }
        }

        /* Close the dataset and its dataspace */
        ret = H5Dclose(dset1);
        CHECK(ret, FAIL, "H5Dclose");

        ret = H5Sclose(sid1);
        CHECK(ret, FAIL, "H5Sclose");

        /* Open the attribute for the file */
        attr = H5Aopen(fid1, NULLATTR, H5P_DEFAULT);
        CHECK(attr, FAIL, "H5Aopen");

        /* Get the space of the dataset */
        attr_sid = H5Aget_space(attr);
        CHECK(attr_sid, FAIL, "H5Aget_space");

        /* Verify the class type of dataspace */
        stype = H5Sget_simple_extent_type(attr_sid);
        VERIFY(stype, H5S_SIMPLE, "H5Sget_simple_extent_type");

        /* Verify there is zero element in the dataspace */
        nelem = H5Sget_simple_extent_npoints(attr_sid);
        VERIFY(nelem, 0, "H5Sget_simple_extent_npoints");

        /* Try reading from the attribute (make certain our buffer is unmodified) */
        ret = H5Aread(attr, H5T_NATIVE_SHORT, rdata_short);
        CHECK(ret, FAIL, "H5Aread");

        /* Check results */
        for(i=0; i<SPACE1_DIM2; i++) {
            for(j=0; j<SPACE1_DIM3; j++) {
                if(rdata_short[i][j] != 7) {
                    H5_FAILED();
                    printf("element [%d][%d] is %d but should have been 7\n",
                           i, j, rdata_short[i][j]);
                }
            }
        }

        /* Close attribute */
        ret=H5Aclose(attr);
        CHECK(ret, FAIL, "H5Aclose");

        /* Close the dataspace */
        ret = H5Sclose(attr_sid);
        CHECK(ret, FAIL, "H5Sclose");

        ret = H5Fclose(fid1);
        CHECK(ret, FAIL, "H5Fclose");
    } /* end for */
} /* test_h5s_zero_dim() */


/****************************************************************
**
**  test_h5s_encode(): Test H5S (dataspace) encoding and decoding.
**
****************************************************************/
static void
test_h5s_encode(void)
{
    hid_t		sid1, sid2, sid3;	/* Dataspace ID		*/
    hid_t               decoded_sid1, decoded_sid2, decoded_sid3;
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		dims1[] = {SPACE1_DIM1, SPACE1_DIM2, SPACE1_DIM3};
    size_t              sbuf_size=0, null_size=0, scalar_size=0;
    unsigned char       *sbuf=NULL, *null_sbuf=NULL, *scalar_buf=NULL;
    hsize_t		tdims[4];	/* Dimension array to test with */
    hssize_t		n;	 	/* Number of dataspace elements */
    hsize_t             start[] = {0, 0, 0};
    hsize_t             stride[] = {2, 5, 3};
    hsize_t             count[] = {2, 2, 2};
    hsize_t             block[] = {1, 3, 1};
    H5S_sel_type        sel_type;
    H5S_class_t         space_type;
    hssize_t            nblocks;
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Dataspace Encoding and Decoding\n"));

    /*-------------------------------------------------------------------------
     * Test encoding and decoding of simple dataspace and hyperslab selection.
     *-------------------------------------------------------------------------
     */
    sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
    CHECK(sid1, FAIL, "H5Screate_simple");

    ret = H5Sselect_hyperslab(sid1, H5S_SELECT_SET, start, stride, count, block);
    CHECK(ret, FAIL, "H5Sselect_hyperslab");

    /* Encode simple data space in a buffer */
    ret = H5Sencode(sid1, NULL, &sbuf_size);
    CHECK(ret, FAIL, "H5Sencode");

    if(sbuf_size>0)
        sbuf = (unsigned char*)HDcalloc((size_t)1, sbuf_size);

    /* Try decoding bogus buffer */
    H5E_BEGIN_TRY {
	ret = H5Sdecode(sbuf);
    } H5E_END_TRY;
    VERIFY(ret, FAIL, "H5Sdecode");

    ret = H5Sencode(sid1, sbuf, &sbuf_size);
    CHECK(ret, FAIL, "H5Sencode");

    /* Decode from the dataspace buffer and return an object handle */
    decoded_sid1=H5Sdecode(sbuf);
    CHECK(decoded_sid1, FAIL, "H5Sdecode");

    /* Verify the decoded dataspace */
    n = H5Sget_simple_extent_npoints(decoded_sid1);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, SPACE1_DIM1 * SPACE1_DIM2 * SPACE1_DIM3,
	   "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(decoded_sid1);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE1_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(decoded_sid1, tdims, NULL);
    CHECK(rank, FAIL, "H5Sget_simple_extent_dims");
    VERIFY(HDmemcmp(tdims, dims1, SPACE1_RANK * sizeof(hsize_t)), 0,
	   "H5Sget_simple_extent_dims");

    /* Verify hyperslabe selection */
    sel_type = H5Sget_select_type(decoded_sid1);
    VERIFY(sel_type, H5S_SEL_HYPERSLABS, "H5Sget_select_type");

    nblocks = H5Sget_select_hyper_nblocks(decoded_sid1);
    VERIFY(nblocks, 2*2*2, "H5Sget_select_hyper_nblocks");

    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(decoded_sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /*-------------------------------------------------------------------------
     * Test encoding and decoding of null dataspace.
     *-------------------------------------------------------------------------
     */
    sid2 = H5Screate(H5S_NULL);
    CHECK(sid2, FAIL, "H5Screate");

    /* Encode null data space in a buffer */
    ret = H5Sencode(sid2, NULL, &null_size);
    CHECK(ret, FAIL, "H5Sencode");

    if(null_size>0)
        null_sbuf = (unsigned char*)HDcalloc((size_t)1, null_size);

    ret = H5Sencode(sid2, null_sbuf, &null_size);
    CHECK(ret, FAIL, "H5Sencode");

    /* Decode from the dataspace buffer and return an object handle */
    decoded_sid2=H5Sdecode(null_sbuf);
    CHECK(decoded_sid2, FAIL, "H5Sdecode");

    /* Verify decoded dataspace */
    space_type = H5Sget_simple_extent_type(decoded_sid2);
    VERIFY(space_type, H5S_NULL, "H5Sget_simple_extent_type");

    ret = H5Sclose(sid2);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(decoded_sid2);
    CHECK(ret, FAIL, "H5Sclose");

    /*-------------------------------------------------------------------------
     * Test encoding and decoding of scalar dataspace.
     *-------------------------------------------------------------------------
     */
    /* Create scalar dataspace */
    sid3 = H5Screate(H5S_SCALAR);
    CHECK(sid3, FAIL, "H5Screate_simple");

    /* Encode scalar data space in a buffer */
    ret = H5Sencode(sid3, NULL, &scalar_size);
    CHECK(ret, FAIL, "H5Sencode");

    if(scalar_size>0)
        scalar_buf = (unsigned char*)HDcalloc((size_t)1, scalar_size);

    ret = H5Sencode(sid3, scalar_buf, &scalar_size);
    CHECK(ret, FAIL, "H5Sencode");

    /* Decode from the dataspace buffer and return an object handle */
    decoded_sid3=H5Sdecode(scalar_buf);
    CHECK(decoded_sid3, FAIL, "H5Sdecode");

    /* Verify extent type */
    space_type = H5Sget_simple_extent_type(decoded_sid3);
    VERIFY(space_type, H5S_SCALAR, "H5Sget_simple_extent_type");

    /* Verify decoded dataspace */
    n = H5Sget_simple_extent_npoints(decoded_sid3);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, 1, "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(decoded_sid3);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, 0, "H5Sget_simple_extent_ndims");

    ret = H5Sclose(sid3);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(decoded_sid3);
    CHECK(ret, FAIL, "H5Sclose");

    HDfree(sbuf);
    HDfree(null_sbuf);
    HDfree(scalar_buf);
}				/* test_h5s_encode() */

/****************************************************************
**
**  test_h5s_scalar_write(): Test scalar H5S (dataspace) writing code.
**
****************************************************************/
static void
test_h5s_scalar_write(void)
{
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t		sid1;	        /* Dataspace ID			*/
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		tdims[4];	/* Dimension array to test with */
    hssize_t		n;	 	/* Number of dataspace elements */
    H5S_class_t         ext_type;       /* Extent type */
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Scalar Dataspace Manipulation during Writing\n"));

    /* Create file */
    fid1 = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fcreate");

    /* Verify a non-zero rank fails with a NULL dimension. */
    H5E_BEGIN_TRY {
        sid1 = H5Screate_simple(SPACE1_RANK, NULL, NULL);
    } H5E_END_TRY
    VERIFY(sid1, FAIL, "H5Screate_simple");

    /* Create scalar dataspace */
    sid1 = H5Screate_simple(SPACE3_RANK, NULL, NULL);
    CHECK(sid1, FAIL, "H5Screate_simple");

    n = H5Sget_simple_extent_npoints(sid1);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, 1, "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(sid1);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE3_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(sid1, tdims, NULL);
    VERIFY(rank, 0, "H5Sget_simple_extent_dims");

    /* Verify extent type */
    ext_type = H5Sget_simple_extent_type(sid1);
    VERIFY(ext_type, H5S_SCALAR, "H5Sget_simple_extent_type");

    /* Create a dataset */
    dataset = H5Dcreate2(fid1, "Dataset1", H5T_NATIVE_UINT, sid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dcreate2");

    ret = H5Dwrite(dataset, H5T_NATIVE_UINT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &space3_data);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close scalar dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
}				/* test_h5s_scalar_write() */

/****************************************************************
**
**  test_h5s_scalar_read(): Test scalar H5S (dataspace) reading code.
**
****************************************************************/
static void
test_h5s_scalar_read(void)
{
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t		sid1;	    	/* Dataspace ID			*/
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		tdims[4];	/* Dimension array to test with */
    hssize_t		n;	 	/* Number of dataspace elements */
    unsigned      	rdata;      	/* Scalar data read in 		*/
    herr_t		ret;		/* Generic return value		*/
    H5S_class_t ext_type;               /* Extent type */

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Scalar Dataspace Manipulation during Reading\n"));

    /* Create file */
    fid1 = H5Fopen(DATAFILE, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fopen");

    /* Create a dataset */
    dataset = H5Dopen2(fid1, "Dataset1", H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dopen2");

    sid1 = H5Dget_space(dataset);
    CHECK(sid1, FAIL, "H5Dget_space");

    n = H5Sget_simple_extent_npoints(sid1);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, 1, "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(sid1);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE3_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(sid1, tdims, NULL);
    VERIFY(rank, 0, "H5Sget_simple_extent_dims");

    /* Verify extent type */
    ext_type = H5Sget_simple_extent_type(sid1);
    VERIFY(ext_type, H5S_SCALAR, "H5Sget_simple_extent_type");

    ret = H5Dread(dataset, H5T_NATIVE_UINT, H5S_ALL, H5S_ALL, H5P_DEFAULT, &rdata);
    CHECK(ret, FAIL, "H5Dread");
    VERIFY(rdata, space3_data, "H5Dread");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close scalar dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
}				/* test_h5s_scalar_read() */

/****************************************************************
**
**  test_h5s_compound_scalar_write(): Test scalar H5S (dataspace) writing for
**          compound datatypes.
**
****************************************************************/
static void
test_h5s_compound_scalar_write(void)
{
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t       	tid1;       	/* Attribute datatype ID	*/
    hid_t		sid1;	    	/* Dataspace ID			*/
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		tdims[4];	/* Dimension array to test with */
    hssize_t		n;	 	/* Number of dataspace elements */
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Scalar Dataspace Manipulation for Writing Compound Datatypes\n"));

    /* Create file */
    fid1 = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fcreate");

    /* Create the compound datatype.  */
    tid1 = H5Tcreate (H5T_COMPOUND, sizeof(struct space4_struct));
    CHECK(tid1, FAIL, "H5Tcreate");
    space4_field1_off=HOFFSET(struct space4_struct, c1);
    ret = H5Tinsert(tid1, SPACE4_FIELDNAME1, space4_field1_off,
		    H5T_NATIVE_SCHAR);
    CHECK(ret, FAIL, "H5Tinsert");
    space4_field2_off=HOFFSET(struct space4_struct, u);
    ret = H5Tinsert(tid1, SPACE4_FIELDNAME2, space4_field2_off,
		    H5T_NATIVE_UINT);
    CHECK(ret, FAIL, "H5Tinsert");
    space4_field3_off=HOFFSET(struct space4_struct, f);
    ret = H5Tinsert(tid1, SPACE4_FIELDNAME3, space4_field3_off,
		    H5T_NATIVE_FLOAT);
    CHECK(ret, FAIL, "H5Tinsert");
    space4_field4_off=HOFFSET(struct space4_struct, c2);
    ret = H5Tinsert(tid1, SPACE4_FIELDNAME4, space4_field4_off,
		    H5T_NATIVE_SCHAR);
    CHECK(ret, FAIL, "H5Tinsert");

    /* Create scalar dataspace */
    sid1 = H5Screate_simple(SPACE3_RANK, NULL, NULL);
    CHECK(sid1, FAIL, "H5Screate_simple");

    n = H5Sget_simple_extent_npoints(sid1);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, 1, "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(sid1);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE3_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(sid1, tdims, NULL);
    VERIFY(rank, 0, "H5Sget_simple_extent_dims");

    /* Create a dataset */
    dataset = H5Dcreate2(fid1, "Dataset1", tid1, sid1, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dcreate2");

    ret = H5Dwrite(dataset, tid1, H5S_ALL, H5S_ALL, H5P_DEFAULT, &space4_data);
    CHECK(ret, FAIL, "H5Dwrite");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close compound datatype */
    ret = H5Tclose(tid1);
    CHECK(ret, FAIL, "H5Tclose");

    /* Close scalar dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
}				/* test_h5s_compound_scalar_write() */

/****************************************************************
**
**  test_h5s_compound_scalar_read(): Test scalar H5S (dataspace) reading for
**          compound datatypes.
**
****************************************************************/
static void
test_h5s_compound_scalar_read(void)
{
    hid_t		fid1;		/* HDF5 File IDs		*/
    hid_t		dataset;	/* Dataset ID			*/
    hid_t		sid1;	    	/* Dataspace ID			*/
    hid_t       	type;       	/* Datatype             	*/
    int		        rank;		/* Logical rank of dataspace	*/
    hsize_t		tdims[4];	/* Dimension array to test with */
    hssize_t		n;	 	/* Number of dataspace elements */
    struct space4_struct rdata; 	/* Scalar data read in 		*/
    herr_t		ret;		/* Generic return value		*/

    /* Output message about test being performed */
    MESSAGE(5, ("Testing Scalar Dataspace Manipulation for Reading Compound Datatypes\n"));

    /* Create file */
    fid1 = H5Fopen(DATAFILE, H5F_ACC_RDWR, H5P_DEFAULT);
    CHECK(fid1, FAIL, "H5Fopen");

    /* Create a dataset */
    dataset = H5Dopen2(fid1, "Dataset1", H5P_DEFAULT);
    CHECK(dataset, FAIL, "H5Dopen2");

    sid1 = H5Dget_space(dataset);
    CHECK(sid1, FAIL, "H5Dget_space");

    n = H5Sget_simple_extent_npoints(sid1);
    CHECK(n, FAIL, "H5Sget_simple_extent_npoints");
    VERIFY(n, 1, "H5Sget_simple_extent_npoints");

    rank = H5Sget_simple_extent_ndims(sid1);
    CHECK(rank, FAIL, "H5Sget_simple_extent_ndims");
    VERIFY(rank, SPACE3_RANK, "H5Sget_simple_extent_ndims");

    rank = H5Sget_simple_extent_dims(sid1, tdims, NULL);
    VERIFY(rank, 0, "H5Sget_simple_extent_dims");

    type=H5Dget_type(dataset);
    CHECK(type, FAIL, "H5Dget_type");

    ret = H5Dread(dataset, type, H5S_ALL, H5S_ALL, H5P_DEFAULT, &rdata);
    CHECK(ret, FAIL, "H5Dread");
    if(HDmemcmp(&space4_data,&rdata,sizeof(struct space4_struct))) {
        printf("scalar data different: space4_data.c1=%c, read_data4.c1=%c\n",space4_data.c1,rdata.c1);
        printf("scalar data different: space4_data.u=%u, read_data4.u=%u\n",space4_data.u,rdata.u);
        printf("scalar data different: space4_data.f=%f, read_data4.f=%f\n",space4_data.f,rdata.f);
        TestErrPrintf("scalar data different: space4_data.c1=%c, read_data4.c1=%c\n",space4_data.c1,rdata.c2);
     } /* end if */

    /* Close datatype */
    ret = H5Tclose(type);
    CHECK(ret, FAIL, "H5Tclose");

    /* Close Dataset */
    ret = H5Dclose(dataset);
    CHECK(ret, FAIL, "H5Dclose");

    /* Close scalar dataspace */
    ret = H5Sclose(sid1);
    CHECK(ret, FAIL, "H5Sclose");

    /* Close file */
    ret = H5Fclose(fid1);
    CHECK(ret, FAIL, "H5Fclose");
}				/* test_h5s_compound_scalar_read() */

/* Data arrays for chunk test */
double  chunk_data_dbl[50000][3];
float  chunk_data_flt[50000][3];

/****************************************************************
**
**  test_h5s_chunk(): Exercise chunked I/O, testing when data conversion
**      is necessary and the entire chunk read in doesn't fit into the
**      conversion buffer
**
****************************************************************/
static void
test_h5s_chunk(void)
{
    herr_t status;
    hid_t fileID, dsetID;
    hid_t plist_id;
    hid_t space_id;
    hsize_t dims[2];
    hsize_t csize[2];
    int i,j;

    fileID = H5Fcreate(DATAFILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    CHECK(fileID, FAIL, "H5Fcreate");

    plist_id = H5Pcreate(H5P_DATASET_CREATE);
    CHECK(plist_id, FAIL, "H5Pcreate");

    csize[0] = 50000;
    csize[1] = 3;
    status = H5Pset_chunk(plist_id, 2, csize);
    CHECK(status, FAIL, "H5Pset_chunk");

    /* Create the data space */
    dims[0] = 50000;
    dims[1] = 3;
    space_id = H5Screate_simple(2, dims, NULL);
    CHECK(space_id, FAIL, "H5Screate_simple");

    dsetID = H5Dcreate2(fileID, "coords", H5T_NATIVE_FLOAT, space_id, H5P_DEFAULT, plist_id, H5P_DEFAULT);
    CHECK(dsetID, FAIL, "H5Dcreate2");

    /* Initialize float array */
    for(i = 0; i < 50000; i++)
        for(j = 0; j < 3; j++)
            chunk_data_flt[i][j] = (float)((i + 1) * 2.5F - j * 100.3F);

    status = H5Dwrite(dsetID, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL, H5P_DEFAULT, chunk_data_flt);
    CHECK(status, FAIL, "H5Dwrite");

    status = H5Pclose(plist_id);
    CHECK(status, FAIL, "H5Pclose");
    status = H5Sclose(space_id);
    CHECK(status, FAIL, "H5Sclose");
    status = H5Dclose(dsetID);
    CHECK(status, FAIL, "H5Dclose");
    status = H5Fclose(fileID);
    CHECK(status, FAIL, "H5Fclose");

    /* Reset/initialize the data arrays to read in */
    HDmemset(chunk_data_dbl, 0, sizeof(double) * 50000 * 3);
    HDmemset(chunk_data_flt, 0, sizeof(float) * 50000 * 3);

    fileID = H5Fopen(DATAFILE, H5F_ACC_RDONLY, H5P_DEFAULT);
    CHECK(fileID, FAIL, "H5Fopen");
    dsetID = H5Dopen2(fileID, "coords", H5P_DEFAULT);
    CHECK(dsetID, FAIL, "H5Dopen2");

    status= H5Dread(dsetID, H5T_NATIVE_DOUBLE, H5S_ALL, H5S_ALL, H5P_DEFAULT, chunk_data_dbl);
    CHECK(status, FAIL, "H5Dread");
    status= H5Dread(dsetID, H5T_NATIVE_FLOAT, H5S_ALL, H5S_ALL, H5P_DEFAULT, chunk_data_flt);
    CHECK(status, FAIL, "H5Dread");

    status = H5Dclose(dsetID);
    CHECK(status, FAIL, "H5Dclose");
    status = H5Fclose(fileID);
    CHECK(status, FAIL, "H5Fclose");

    for(i=0; i<50000; i++) {
        for(j=0; j<3; j++) {
            /* Check if the two values are within 0.001% range. */
            if(!DBL_REL_EQUAL(chunk_data_dbl[i][j], chunk_data_flt[i][j], 0.00001F))
                TestErrPrintf("%u: chunk_data_dbl[%d][%d]=%e, chunk_data_flt[%d][%d]=%e\n", (unsigned)__LINE__, i, j, chunk_data_dbl[i][j], i, j, chunk_data_flt[i][j]);
        } /* end for */
    } /* end for */
} /* test_h5s_chunk() */

/****************************************************************
**
**  test_h5s_extent_equal(): Exercise extent comparison code
**
****************************************************************/
static void
test_h5s_extent_equal(void)
{
    hid_t null_space;           /* Null dataspace */
    hid_t scalar_space;         /* Scalar dataspace */
    hid_t d1_space1, d1_space2, d1_space3, d1_space4; /* 1-D dataspaces */
    hid_t d2_space1, d2_space2, d2_space3, d2_space4; /* 2-D dataspaces */
    hid_t d3_space1, d3_space2, d3_space3, d3_space4; /* 3-D dataspaces */
    hsize_t d1_dims1[1] = {10}, /* 1-D dimensions */
        d1_dims2[1] = {20},
        d1_dims3[1] = {H5S_UNLIMITED};
    hsize_t d2_dims1[2] = {10, 10},             /* 2-D dimensions */
        d2_dims2[2] = {20, 20},
        d2_dims3[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t d3_dims1[3] = {10, 10, 10},         /* 3-D dimensions */
        d3_dims2[3] = {20, 20, 20},
        d3_dims3[3] = {H5S_UNLIMITED, H5S_UNLIMITED, H5S_UNLIMITED};
    htri_t ext_equal;           /* Whether two dataspace extents are equal */
    herr_t ret;                 /* Generic error return */

    /* Create dataspaces */
    null_space = H5Screate(H5S_NULL);
    CHECK(null_space, FAIL, "H5Screate");

    scalar_space = H5Screate(H5S_SCALAR);
    CHECK(scalar_space, FAIL, "H5Screate");

    d1_space1 = H5Screate_simple(1, d1_dims1, NULL);
    CHECK(d1_space1, FAIL, "H5Screate");
    d1_space2 = H5Screate_simple(1, d1_dims2, NULL);
    CHECK(d1_space2, FAIL, "H5Screate");
    d1_space3 = H5Screate_simple(1, d1_dims1, d1_dims2);
    CHECK(d1_space3, FAIL, "H5Screate");
    d1_space4 = H5Screate_simple(1, d1_dims1, d1_dims3);
    CHECK(d1_space4, FAIL, "H5Screate");

    d2_space1 = H5Screate_simple(2, d2_dims1, NULL);
    CHECK(d2_space1, FAIL, "H5Screate");
    d2_space2 = H5Screate_simple(2, d2_dims2, NULL);
    CHECK(d2_space2, FAIL, "H5Screate");
    d2_space3 = H5Screate_simple(2, d2_dims1, d2_dims2);
    CHECK(d2_space3, FAIL, "H5Screate");
    d2_space4 = H5Screate_simple(2, d2_dims1, d2_dims3);
    CHECK(d2_space4, FAIL, "H5Screate");

    d3_space1 = H5Screate_simple(3, d3_dims1, NULL);
    CHECK(d3_space1, FAIL, "H5Screate");
    d3_space2 = H5Screate_simple(3, d3_dims2, NULL);
    CHECK(d3_space2, FAIL, "H5Screate");
    d3_space3 = H5Screate_simple(3, d3_dims1, d3_dims2);
    CHECK(d3_space3, FAIL, "H5Screate");
    d3_space4 = H5Screate_simple(3, d3_dims1, d3_dims3);
    CHECK(d3_space4, FAIL, "H5Screate");

    /* Compare all dataspace combinations */

    /* Compare null dataspace against all others, including itself */
    ext_equal = H5Sextent_equal(null_space, null_space);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(null_space, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare scalar dataspace against all others, including itself */
    ext_equal = H5Sextent_equal(scalar_space, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, scalar_space);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(scalar_space, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 1-D dataspace w/no max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d1_space1, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d1_space1);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space1, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare larger 1-D dataspace w/no max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d1_space2, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d1_space2);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space2, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 1-D dataspace w/fixed max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d1_space3, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d1_space3);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space3, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 1-D dataspace w/unlimited max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d1_space4, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d1_space4);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d1_space4, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 2-D dataspace w/no max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d2_space1, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d2_space1);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space1, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare larger 2-D dataspace w/no max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d2_space2, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d2_space2);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space2, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 2-D dataspace w/fixed max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d2_space3, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d2_space3);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space3, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 2-D dataspace w/unlimited max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d2_space4, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d2_space4);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d2_space4, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 3-D dataspace w/no max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d3_space1, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d3_space1);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space1, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare larger 2-D dataspace w/no max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d3_space2, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d3_space2);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space2, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 2-D dataspace w/fixed max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d3_space3, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d3_space3);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space3, d3_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");

    /* Compare small 2-D dataspace w/unlimited max. dims against all others, including itself */
    ext_equal = H5Sextent_equal(d3_space4, null_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, scalar_space);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d1_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d1_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d1_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d1_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d2_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d2_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d2_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d2_space4);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d3_space1);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d3_space2);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d3_space3);
    VERIFY(ext_equal, FALSE, "H5Sextent_equal");
    ext_equal = H5Sextent_equal(d3_space4, d3_space4);
    VERIFY(ext_equal, TRUE, "H5Sextent_equal");

    /* Close dataspaces */
    ret = H5Sclose(null_space);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(scalar_space);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(d1_space1);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d1_space2);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d1_space3);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d1_space4);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(d2_space1);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d2_space2);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d2_space3);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d2_space4);
    CHECK(ret, FAIL, "H5Sclose");

    ret = H5Sclose(d3_space1);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d3_space2);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d3_space3);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(d3_space4);
    CHECK(ret, FAIL, "H5Sclose");
} /* test_h5s_extent_equal() */

/****************************************************************
**
**  test_h5s_extent_copy(): Exercise extent copy code
**
****************************************************************/
static void
test_h5s_extent_copy(void)
{
    hid_t spaces[14] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}; /* Array of all dataspaces */
    hid_t tmp_space = -1;
    hsize_t d1_dims1[1] = {10}, /* 1-D dimensions */
        d1_dims2[1] = {20},
        d1_dims3[1] = {H5S_UNLIMITED};
    hsize_t d2_dims1[2] = {10, 10},             /* 2-D dimensions */
        d2_dims2[2] = {20, 20},
        d2_dims3[2] = {H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t d3_dims1[3] = {10, 10, 10},         /* 3-D dimensions */
        d3_dims2[3] = {20, 20, 20},
        d3_dims3[3] = {H5S_UNLIMITED, H5S_UNLIMITED, H5S_UNLIMITED};
    hsize_t npoints[14];        /* Expected number of points in selection for each element in spaces */
    hssize_t npoints_ret;       /* Number of points returned by H5Sget_select_npoints() */
    htri_t ext_equal;           /* Whether two dataspace extents are equal */
    const unsigned num_spaces = sizeof(spaces) / sizeof(spaces[0]);
    unsigned i, j;
    herr_t ret;                 /* Generic error return */

    /* Create dataspaces */
    spaces[0] = H5Screate(H5S_NULL);
    CHECK(spaces[0], FAIL, "H5Screate");
    npoints[0] = (hsize_t)0;

    spaces[1] = H5Screate(H5S_SCALAR);
    CHECK(spaces[1], FAIL, "H5Screate");
    npoints[1] = (hsize_t)1;

    spaces[2] = H5Screate_simple(1, d1_dims1, NULL);
    CHECK(spaces[2], FAIL, "H5Screate");
    npoints[2] = d1_dims1[0];
    spaces[3] = H5Screate_simple(1, d1_dims2, NULL);
    CHECK(spaces[3], FAIL, "H5Screate");
    npoints[3] = d1_dims2[0];
    spaces[4] = H5Screate_simple(1, d1_dims1, d1_dims2);
    CHECK(spaces[4], FAIL, "H5Screate");
    npoints[4] = d1_dims1[0];
    spaces[5] = H5Screate_simple(1, d1_dims1, d1_dims3);
    CHECK(spaces[5], FAIL, "H5Screate");
    npoints[5] = d1_dims1[0];

    spaces[6] = H5Screate_simple(2, d2_dims1, NULL);
    CHECK(spaces[6], FAIL, "H5Screate");
    npoints[6] = d2_dims1[0] * d2_dims1[1];
    spaces[7] = H5Screate_simple(2, d2_dims2, NULL);
    CHECK(spaces[7], FAIL, "H5Screate");
    npoints[7] = d2_dims2[0] * d2_dims2[1];
    spaces[8] = H5Screate_simple(2, d2_dims1, d2_dims2);
    CHECK(spaces[8], FAIL, "H5Screate");
    npoints[8] = d2_dims1[0] * d2_dims1[1];
    spaces[9] = H5Screate_simple(2, d2_dims1, d2_dims3);
    CHECK(spaces[9], FAIL, "H5Screate");
    npoints[9] = d2_dims1[0] * d2_dims1[1];

    spaces[10] = H5Screate_simple(3, d3_dims1, NULL);
    CHECK(spaces[10], FAIL, "H5Screate");
    npoints[10] = d3_dims1[0] * d3_dims1[1] * d3_dims1[2];
    spaces[11] = H5Screate_simple(3, d3_dims2, NULL);
    CHECK(spaces[11], FAIL, "H5Screate");
    npoints[11] = d3_dims2[0] * d3_dims2[1] * d3_dims2[2];
    spaces[12] = H5Screate_simple(3, d3_dims1, d3_dims2);
    CHECK(spaces[12], FAIL, "H5Screate");
    npoints[12] = d3_dims1[0] * d3_dims1[1] * d3_dims1[2];
    spaces[13] = H5Screate_simple(3, d3_dims1, d3_dims3);
    CHECK(spaces[13], FAIL, "H5Screate");
    npoints[13] = d3_dims1[0] * d3_dims1[1] * d3_dims1[2];

    tmp_space = H5Screate(H5S_NULL);
    CHECK(tmp_space, FAIL, "H5Screate");

    /* Copy between all dataspace combinations.  Note there are a few
     * duplicates. */
    for(i = 0; i < num_spaces; i++)
        for(j = i; j < num_spaces; j++) {
            /* Copy from i to j, unless the inner loop just restarted, in which
             * case i and j are the same, so the second call to H5Sextent_copy()
             * will test copying from i/j to i/j */
            ret = H5Sextent_copy(tmp_space, spaces[j]);
            CHECK(ret, FAIL, "H5Sextent_copy");

            /* Verify that the extents are equal */
            ext_equal = H5Sextent_equal(tmp_space, spaces[j]);
            VERIFY(ext_equal, TRUE, "H5Sextent_equal");

            /* Verify that the correct number of elements is selected */
            npoints_ret = H5Sget_select_npoints(tmp_space);
            VERIFY((hsize_t)npoints_ret, npoints[j], "H5Sget_select_npoints");

            /* Copy from j to i */
            ret = H5Sextent_copy(tmp_space, spaces[i]);
            CHECK(ret, FAIL, "H5Sextent_copy");

            /* Verify that the extents are equal */
            ext_equal = H5Sextent_equal(tmp_space, spaces[i]);
            VERIFY(ext_equal, TRUE, "H5Sextent_equal");

            /* Verify that the correct number of elements is selected */
            npoints_ret = H5Sget_select_npoints(tmp_space);
            VERIFY((hsize_t)npoints_ret, npoints[i], "H5Sget_select_npoints");
        } /* end for */

    /* Close dataspaces */
    for(i = 0; i < num_spaces; i++) {
        ret = H5Sclose(spaces[i]);
        CHECK(ret, FAIL, "H5Sclose");
        spaces[i] = -1;
    } /* end for */

    ret = H5Sclose(tmp_space);
    CHECK(ret, FAIL, "H5Sclose");
} /* test_h5s_extent_copy() */

/****************************************************************
**
**  test_h5s_bug1(): Test Creating dataspace with H5Screate then
*                    setting extent with H5Sextent_copy.
**
****************************************************************/
static void
test_h5s_bug1(void)
{
    hid_t space1;               /* Dataspace to copy extent to */
    hid_t space2;               /* Scalar dataspace */
    hsize_t dims[2] = {10, 10}; /* Dimensions */
    hsize_t start[2] = {0, 0};  /* Hyperslab start */
    htri_t select_valid;        /* Whether the dataspace selection is valid */
    herr_t ret;                 /* Generic error return */

    /* Create dataspaces */
    space1 = H5Screate(H5S_SIMPLE);
    CHECK(space1, FAIL, "H5Screate");
    space2 = H5Screate_simple(2, dims, NULL);
    CHECK(space2, FAIL, "H5Screate");

    /* Copy extent to space1 */
    ret = H5Sextent_copy(space1, space2);
    CHECK(ret, FAIL, "H5Sextent_copy");

    /* Select hyperslab in space1 containing entire extent */
    ret = H5Sselect_hyperslab(space1, H5S_SELECT_SET, start, NULL, dims, NULL);
    CHECK(ret, FAIL, "H5Sselect_hyperslab");

    /* Check that space1's selection is valid */
    select_valid = H5Sselect_valid(space1);
    CHECK(select_valid, FAIL, "H5Sselect_valid");
    VERIFY(select_valid, TRUE, "H5Sselect_valid result");

    /* Close dataspaces */
    ret = H5Sclose(space1);
    CHECK(ret, FAIL, "H5Sclose");
    ret = H5Sclose(space2);
    CHECK(ret, FAIL, "H5Sclose");
} /* test_h5s_bug1() */

/****************************************************************
**
**  test_h5s(): Main H5S (dataspace) testing routine.
**
****************************************************************/
void
test_h5s(void)
{
    /* Output message about test being performed */
    MESSAGE(5, ("Testing Dataspaces\n"));

    test_h5s_basic();		/* Test basic H5S code */
    test_h5s_null();		/* Test Null dataspace H5S code */
    test_h5s_zero_dim();        /* Test dataspace with zero dimension size */
    test_h5s_encode();          /* Test encoding and decoding */
    test_h5s_scalar_write();	/* Test scalar H5S writing code */
    test_h5s_scalar_read();	/* Test scalar H5S reading code */

    test_h5s_compound_scalar_write();	/* Test compound datatype scalar H5S writing code */
    test_h5s_compound_scalar_read();	/* Test compound datatype scalar H5S reading code */

    /* This test was added later to exercise a bug in chunked I/O */
    test_h5s_chunk();	        /* Exercise bug fix for chunked I/O */

    test_h5s_extent_equal();	/* Test extent comparison code */
    test_h5s_extent_copy();     /* Test extent copy code */
    test_h5s_bug1();            /* Test bug in offset initialization */
} /* test_h5s() */


/*-------------------------------------------------------------------------
 * Function:	cleanup_h5s
 *
 * Purpose:	Cleanup temporary test files
 *
 * Return:	none
 *
 * Programmer:	Albert Cheng
 *              July 2, 1998
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
void
cleanup_h5s(void)
{
    remove(DATAFILE);
    remove(NULLFILE);
    remove(BASICFILE);
    remove(ZEROFILE);
}
